Abstract: This pull out sofa bed is an improvement of the sofa bed disclosed in U.S. Pat. No. 3,984,883, granted Oct. 12, 1976. The change over the disclosure in said patent involves essentially several links different in figuration, and addition of a rivet. Primarily the change reduces the cost of manufacturing the bed with less material to accomplish the resulting operation. Also the spring actuated mechanism to retain the present bed in fully folded condition, was modified and allows for better closure of the bed.

Abstract: This pull out sofa bed is an improvement of the sofa bed disclosed in U.S. Pat. No. 3,984,883 dated Oct. 12, 1976 and assigned to the assignee of the present application. In said patent bed there is in effect a lost motion during which no work of compressing the mattress is being performed while slack is being taken up. Consequently the work required to compress the mattress and create the necessary locking of the compressed mattress, is concentrated over a relatively short part of the closing cycle of the folding of the bed. The result of this is that a relatively high "peak" force is required at this portion of the cycle to close the bed and compress the mattress and lock the bed in closed position, thereby requiring exertion of considerable strength by the person closing the bed. The patented bed is satisfactory when the mattresses were made of polyfoam.